linux-kernel - Re: [PATCH V2 0/3] Introduce and use DO

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Message-ID: <20090522070111.GZ8633@ZenIV.linux.org.uk>
Date:	Fri, 22 May 2009 08:01:11 +0100
From:	Al Viro <viro@...IV.linux.org.uk>
To:	Joe Perches <joe@...ches.com>
Cc:	linux-kernel@...r.kernel.org, cpufreq@...r.kernel.org,
	Dave Jones <davej@...hat.com>,
	Greg Kroah-Hartman <gregkh@...e.de>,
	"H. Peter Anvin" <hpa@...or.com>, Ingo Molnar <mingo@...hat.com>,
	x86@...nel.org, Len Brown <len.brown@...el.com>,
	Mike Travis <travis@....com>,
	Rusty Russell <rusty@...tcorp.com.au>,
	Thomas Gleixner <tglx@...utronix.de>,
	Venkatesh Pallipadi <venkatesh.pallipadi@...el.com>,
	Alan Cox <alan@...rguk.ukuu.org.uk>
Subject: Re: [PATCH V2 0/3] Introduce and use DO_ONCE statement expression
	macro

On Thu, May 21, 2009 at 10:39:16PM -0700, Joe Perches wrote:
> On Fri, 2009-05-22 at 06:26 +0100, Al Viro wrote:
> > Your DO_ONCE(....) parses as "what the fuck is that?" followed by
> > grepping for definition, and the cost is much higher.
> 
> So what do you suggest?
> 
> #define pr_info_once(fmt, args...)	printk_once(KERN_INFO pr_fmt(fmt), ##args)
> #define pr_warning_once(fmt, args...)	printk_once(KERN_WARNING pr_fmt(fmt), ##args)
> etc

That would be much saner.
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